Spot and set: Controlling lighting patterns of LEDs through a smartphone

People enjoy various social events, and illumination plays an important role in creating a good atmosphere during these events. Usually, people illuminate trees and walls by laying cables with a bunch of LEDs. However, they do not have control over the lighting patterns; instead, they just select a preset pattern. In this paper, we propose a system to control the lighting patterns of LEDs. In our system, a user´s smartphone works as a controller. The user holds his/her smartphone with a backside light over a light sensor that corresponds to a particular LED. Once one or more LEDs are selected, the user sets the desired lighting pattern. We consider that this approach extends a user´s range of expression at little learning cost.